Engine



J. C. FEDERLE May 12, 1925.

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[III 222 e 55 E5 Patented May 12, 1925.

UNITED STATES PATENT OFFICE.

JOSEPH C. FEDERLE, OI DAYTON, OHIO, ASSIGNOR T DELCO-LIGHT COMPANY, OF

DAYTON, OHIO, A CORPORATION OF DELAWARE ENGINE.

Application filed February 24, 1923. Serial No. 621,097.

and'State of Ohio, have invented certain. new and useful Improvements inEngines,

of which the following is a full, clear, and

. exact description.

This invention relates to internal-com bustion engines and has amongutsob ects to provide an automatic fuel mixture control whereby during thecranking period the engine is provided with a relatively rich fuelmixture to facilitate starting the engine, and when the engine isself-operative, the richness of the mixture is reduced to suit the reuirements of engine running.

ther and further objects and advantages of the present invention will beapparent from the following description of a' preferred form thereof,reference being made to the accompanying drawings.

In the drawings:

Fig. 1 is an end view of an internal-co nbustion engine equipped withthe present 1nvention;

Fig. 2 is a sectional view on the line 2-2 of Fig. 1;

Fig. .3 is a sectional view on the line 33 of Fig. 2; and

Fig. 4 is a sectional View on line 4-4of Fi 2.

l n" the drawings, 20 designates an engine and generator power unitwhich includes an engine intake 21. on which is mounted by means ofscrews 22 a carburetor 23, which includes a body 24 constituting a framefor a carburetor. Body 24 includes a pump cylinder 25 which cooperateswith a pump piston 26 having connections with the valve mechanism of theengine through a rockerv arm 27 fulcrumed on post 28, and through a link29 adapted to be connected with one of the rocker arms of the valvemechanism .of the engine. 'The pump causes fuel to be' withdrawn from atank 30 through a pipe 31 and to be delivered into a constant level fuelchamber 32, having an overflow 33 connegated by pipe 34 with tank 30.

The body 24 is provided with a passage connected by breather pipe 41with the engine crank case 42. Passage 40 includes a venturi restriction'43 connected by a nozzle 44 with the fuel chamber 32. Nozzle 44 iscontrolled by a needle valve 45 extending through a bushing 46 andprovided with flanges 47 and 48.

A magnet 50 is mounted on a frame 51 supported by the body 24, andcooperates with armature 52 pivoted at 53. Armature 52 isnormally heldby a spring 54 against a stop 55 with its other end tending to maintainthe shoulder 47 upon the upper end of the bushing 46. This position ofthe needle valve 45 provides the restriction of the nozzle 44 necessaryto give the proper mixture for engine running. One terminal of themagnet 50 is connected with a storage battery which may be charged bythe generating plant 20, and the other end of magnet 50 is connectedwith a contact 61 normally engaged with a switch contact 62 ofbimetallic thermostat metal connected with battery 60. The engine, andpreferably adjacent the cylinder head so that the contact 62 will bendaway from the contact 61 when the cylinder head has attained atemperature normally attained when the engine is self-operative.

WVhen the engine is idle and the cylinder head is coldcontacts 61 and 62will touch and the magnet 50 will receive current from the battery 60.The armature 52 will be attracted and will cooperate with theflange 48on the needlevalve 45 to retract the valve slightly from the nozzle 44.The restriction of the nozzle 44 being decreased more fuel can be drawninto the passage 40 for a given enginelsuction than when the valve 45 isin its lower position. Consequently the fuel mixture will berichenbefore the engine cylinder head has attained a certain temperaturecausing the contacts 61 and 62 to separate than after this temperaturehas been reached.

When the, engine becomes self-operative and has attained-a certain speedthe cylinder head will finally attain a temperature sufficient to causethe thermostat contact 62 to bend away from the contact 61 thusinterrupting the magnet circuit and permitting the armature 52 to'return to its normal position during engine running. In this manner thefuel mixture proportions are controlled in response to a change intemperature of the cylinder head. When the engine is cold an initiallyrich mixture is provided en the engine develops a certain amount of heatdue to self-operation the richness of the fuel mixture is reduced no v ,ations made in the shape, size, and propor tion of the elements thereinwithout depart- 40 is provided with an, electrical heating coil 7 2adapted to be connected with; the battery by suitable circuits whichare'not, however, illustrated as this heating feature forms no part ofthe invention to which this )resent application relates. Thisapplication discloses means for automatically startin and stopping agenerating plant in w ich electrical circuits are provided forconnection with the electro-magnet and thermostat switch included in thepresent invention. I

The admission of air to the.passage 40 1s controlled by valve mounted onshaft 81 provided with handle 82. v

The bushing 46 is adjustable with respect to the body 24 in order toprovide an initial adjustment of the fuel mixture proportions. The richmixture could be made richer in cold weather than during warmer weather,therefore the bushing 46 can be screwed out of the body 24 causing thevalve 45- to be retracted from the nozzle' l t. This adjustment willprovide a running mixture which is also more'rich in cold weather thanin warm, and this is desirable since it is more difficult to vaporizeengine fuels in, cold weather than in warm.

It is advantageous to control the magnet 50 in correspondence with theheat of the engine because the warming up period is longer in coldweather than in warm and consequently the duration of the initially richmixture should be longer. In the present invention the greater the timeto' warm up the engine the'greater will be the duration of the deliveryof the rich starting mixture.

While the form of mechanism herein shown and described constitutes apreferred embodiment of one form of the invention, it is tobe understoodthat other forms might be adopted and various changes and altering fromthe spirit and scope of the invention.

What is claimed is as follows: 7

1. In a fuel control system for internalcombustion engines, thecombination with means for controlling the fuel mixture proportions; ofan electromagnet for actuating said means; a current source; a circuitin which said electromagnet and current source are included: and meansfor breaking said circuit after the engine has started, and has becomeheated to a pre-determined degree.

2. In a fuel control system for internalcombustion engines, thecombination with means for controlling the fuel mixture proportions; ofan electromagnet for actuating said means; a'current source; a circuitin which said electromagnet and current source are included; andtemperature responsive means for breaking said circuit upon a rise inengine temperature.

3. Ina fuel control system for internal combustion engines, thecombination with means for controlling the fuel mixture pr0-.

portions, including a nozzle and a needle valve; of an eletromagnet foractuating said valve; a current source; a circuit in which saidelectro-magnet and current source are included;.and a thermostat switchlocated adjacent the cylinder head for breaking said circuit after theengine has started and has become heated'to a pre-determined degree.

5. In a device. of the class described and in. combination with acarburetor having a nozzle arranged to supply liquid fuel to anairpassage, a valve for controlling the flow of liquid fuel through saidnozzle, and which Valve is initially open to thereby permit a copioussupply of liquid fuel to said passage; means including an electro-ma et'for operating said valve to restrict the ow of liquid fuel. through thenozzle and into the passage aforesaid; a circuit in which saidelectromagnet is included; and a thermostat exposed to enginetemperature for controlling said circuit.

6. In a device of the class described and in combination with acarburetor having a nozzle arranged to supply liquid fuel to an airpasse e, a valve for controlling the flow of iqui fuel through saidnozzle, and which valve is initially open to thereby permit a copioussupply of li uid fuelto said passage; an electro-magnet aving anarmaturewhich is operatively connected with said valve; a normally closedcircuit wherein said electro-ma net is included; and a thermostat exposeto engine temperature for breaking said circuit upon a rise of enginetemperature. a

7. In a device of the class described and in combination with acarburetor having a nozzle arranged to supply liquid fuel to an airpassage, a valve for controlling the flow of liquid fuel through saidnozzle, and which valve is initially open to thereby permit a copioussupply of liquid fuel to said passage; an electro-magnet having anarmature which is operatively connected with said valve to open thesame; a spring acting upon said armature and tending to close saidvalve; a normally closed circuit.

wherein said electro-magnet is included; and a thermostat included insaid circuit and exposed to engine temperature for breaking said circuitupon a rise of engine temperatur'e.

8. In a fuel control system for internalcombustion engines, thecombination with means including a movable member for controlling thefuel mixture proportions; of an electromagnet for controlling said]member; of a circuit for controlling the electromagnet; and means forcontrolling saidcircuit after the engine has started, and has becomeheated to a predetermined degree.

9. In a fuel control-system for internalcombustion engines, thecombination with means including a movable member for controlling thefuel mixture proportions; of an electromagnet for controlling saidmember;

of a circuit for controlling said electromagnet; and temperatureresponsive means for controlling said circuit upon a rise in enginetemperature.

10. In a fuel control system for internalcombustion engines, thecombination with means for controlling the fuel mixture proportions,including a nozzle and a needle valve; of an clectromagnetforcontrolling said valve; of a circuit for controlling said valve; of acircuit for controlling the electromagnet; and means for controllingsaid circuit after the engine has started, and has become'heated to apredetermined degree.

11. In a device of the class described and in combination with acarburetor having a nozzle arranged to supply liquid fuel to an airpassage, a valve for controlling the flow of liquid fuel throughsaidnozzle; and which valve is initially open to thereby permit '21copious supply of liquid fuel to Said passage; an electromagnet havingan armature which is operatively connected with said valve; a circuitfor controlling said electromagnet; and a thermostat exposed to enginetemperature for controlling'said circuit whereby the valve returns toclosed position upon a rise of engine temperature.

'In testimony whereof I hereto affix my signature.

JOSEPH o. FEDERLE.

. Witnesses:

Minoan!) PEASE,

LLOYD M. Kmemmr.

